EP3207599B1 - Bague collectrice ayant une fonction de contrôle de l'usure - Google Patents

Bague collectrice ayant une fonction de contrôle de l'usure Download PDF

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Publication number
EP3207599B1
EP3207599B1 EP15781068.0A EP15781068A EP3207599B1 EP 3207599 B1 EP3207599 B1 EP 3207599B1 EP 15781068 A EP15781068 A EP 15781068A EP 3207599 B1 EP3207599 B1 EP 3207599B1
Authority
EP
European Patent Office
Prior art keywords
sliding
brush
track
slip
tracks
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15781068.0A
Other languages
German (de)
English (en)
Other versions
EP3207599A2 (fr
Inventor
Christian Holzapfel
Holger Steffens
Matthias Hermann
Holger HÄFFNER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schleifring GmbH
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Schleifring GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP3207599A2 publication Critical patent/EP3207599A2/fr
Application granted granted Critical
Publication of EP3207599B1 publication Critical patent/EP3207599B1/fr
Active legal-status Critical Current
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/58—Means structurally associated with the current collector for indicating condition thereof, e.g. for indicating brush wear
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/56—Devices for lubricating or polishing slip-rings or commutators during operation of the collector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/12—Manufacture of brushes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/08—Slip-rings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/20—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof
    • H01R39/22—Contacts for co-operation with commutator or slip-ring, e.g. contact brush characterised by the material thereof incorporating lubricating or polishing ingredient

Definitions

  • the invention relates to Slip-ring for transmission of electrical signals between rotating parts. Specifically, it relates to wear monitoring and a slip-ring device with improved wear monitoring.
  • Electrical slip rings are used to transfer electrical power and/or signals between a rotating and a stationary part. Such devices are used in different applications, like wind energy plants or computer tomography scanners. There are also several military and aerospace applications.
  • Slip rings are generally based on a first part having sliding tracks and a second part having brushes for sliding on the sliding tracks. Due to the mechanical friction there is wear which causes the slip ring to degrade over time.
  • US 4831302 A discloses a wear indicator are known which determines the length of a carbon brush and therefore indicates the wear of the brush.
  • the sliding tracks In most slip rings the sliding tracks have significantly longer lifetimes than the brushes, but they are also susceptible to wear. There is no means which gives an indication of the wear of sliding tracks.
  • EP 2 704 267 A2 discloses a slipring with an integrated test System.
  • WO 2014/094832 A1 discloses a self-lubricating slipring.
  • the problem to be solved by the invention is to provide a slip-ring having a reliable wear indication which is able to indicate wear of a slip-ring brush and/or of a sliding track.
  • a slip-ring assembly comprises a slip ring module, a slip ring brush block and a wear indication circuit, the slip-ring module having a plurality of sliding tracks, the slip-ring brush block having a plurality of sliding brushes sliding the tracks, wherein at least one of the sliding tracks is a wear indication track.
  • the at least one wear indicator track preferably is a sliding track which is not used for any further signal transmission. This at least one track is preferably used for wear indication.
  • there is a wear indication circuit which evaluates the status and/or quality and/or functionality of the wear indicator track.
  • It may measure at least one of a voltage drop, a noise, a bit error rate, a temperature, a contact resistance and contact interrupts which may be generated by a worn sliding track to generate a warning signal.
  • a detection of wear if the transmission is interrupted due to wear.
  • at least one of the wear indication tracks is exclusively connected to the wear indication circuit.
  • the wear indication track may be used for transmission of a signal, which is of low importance for the system into which the slip-ring assembly is integrated, but which can easily be detected, such that a failure of the wear indication track can be detected by identifying a failure of said low importance signal.
  • the wear indication track is a sliding track preconfigured for having a shorter lifetime, compared to the remaining tracks. Most preferably, it is a pre-worn track. Therefore, it is preferred, if the wear indication track has a shorter lifetime than the remaining tracks. It may have passed a pre-wear procedure which may be a run-in procedure, and preferably a run-in procedure under conditions which accelerate wear of the sliding track, like high temperature, high speed, or similar conditions.
  • the wear indicator track is pre-used or pre-worn or is at least made such, that it shows the properties of wear earlier than the other tracks. Therefore the design lifetime of the wear indicator track is less than the design lifetime of the other tracks.
  • the wear indication track may be manufactured by a process resulting in a shorter lifetime compared to the remaining tracks.
  • a process may for example be a galvanic plating with a thinner surface, such that the galvanic plating is worn earlier than the thicker platings of the remaining tracks.
  • This may for example be done by applying a higher brush pressure for pressing the brush against the sliding track. This may be done by using a stronger spring for a carbon brush or by using a stiffer wire in the case of the wire brush. It may also be done by applying less grease or oil to the track. In a further embodiment it may be done by applying a higher current or at least a higher current density to the brush, which may for example be done by using a thinner brush wire.
  • one sliding brush wears quicker than other brushes. This may in addition provide a reliable brush wear indication.
  • a sensor may be provided.
  • the sensor may be a temperature sensor, which for example may detect over-temperature or which even may detect the temperature profile of the slip-ring and calculate lifetime expectancy independent of temperature. For example, extremely high or low temperature may decrease lifetime, whereas using the slip-ring at moderate temperature levels may increase lifetime.
  • There may be an optical sensor which for example may detect arches at the slip-ring.
  • There may be a shock and/or vibration sensor for detecting mechanical vibrations, which may be an indication of a worn slip-ring module. It may also detect external vibration, which further would reduce the lifetime of the slip-ring assembly.
  • a slip-ring assembly 100 comprises a slip-ring module 110 and a slip-ring brush block 120.
  • the slip-ring module 110 may rotate about the rotation axis 15 and comprises an isolating body 10, having a plurality of sliding tracks.
  • four sliding tracks 11, 12, 13, and 14 are shown. It is obvious, that there may be any other number of sliding tracks.
  • the sliding tracks are embedded and/or held by the isolating body. Preferably, the sliding tracks are isolated against each other. There may also be configurations, where at least some of the sliding tracks are connected together electrically. This may be useful for transferring higher currents or signals with a lower noise level.
  • a preferred embodiment of sliding tracks having V-shaped grooves is shown. These V-grooves have the advantage that they can guides wires sliding on them and keep them precisely on a predetermined track. It is obvious that any other type of sliding track may be used instead, like tracks having multiple grooves or tracks without grooves, having a plane surface.
  • the slip-ring brush block comprises a brush carrier 20 which may be a printed circuit board or any other isolating material. It may also comprise a conducting material like a metal, with isolated portions for holding the brushes. It holds a plurality of sliding brushes. In this embodiment, four wire brushes are shown. It is obvious, that there may be any other number of brushes and any other kind of brushes. For example, there may be multi-fiber brushes or carbon brushes. The brushes are spaced such that they fit to corresponding sliding tracks of the slip-ring module. There must not necessarily be one brush per sliding track. There may also be a plurality of brushes contacting a sliding track to increase current capability and/or reduce noise and/or contact resistance.
  • first sliding brush 21 having a first section 21a and a second section 21b contacts first sliding track 11
  • second sliding brush 22 contacts second sliding track 12
  • third sliding brush 23 contacts third sliding track 13
  • fourth sliding brush 24 contacts fourth sliding track 14.
  • first sliding track 11 together with the first sliding brush 21 are used for wear indication. They may be used together with second sliding track 12 and second sliding brush 22, as will be shown later. Of course any other sliding tracks together with their sliding brushes may be used for wear indication.
  • FIG 2 a sectional view of the first embodiment is shown in a plane cut through lines A-A in figure 1 . It is preferred, if the slip-ring module has a free bore, for example for carrying cables.
  • a connector 16 is shown, which may be a soldering point or soldering pin or a connector, which contacts the first sliding track 11.
  • a connecting cable may be soldered to this connector.
  • the other sliding tracks also have connectors to contact the sliding tracks from the inner side of the isolating body.
  • FIG 3 a circuit diagram of a first embodiment is shown.
  • the slip-ring assembly shown comprises a main signal path through third sliding brush 23 together with third sliding track 13, and fourth sliding brush 24 together with fourth sliding track 14 which is accessible through first brush connection 41, second brush connection 42, and first ring connection 43, second ring connection 44.
  • It further comprises a wear indication circuit 50 having a first test port 51 and a second test port 52 connected to first sliding brush 21 and second sliding brush 22, which are in contact with first sliding track 11 and second sliding track 12. Both sliding tracks are connected to each other, therefore allowing a current flow between first test port 51 and second test port 52.
  • the test results are output via signal port 53.
  • the third sliding brush 23 together with third sliding track 13, fourth sliding brush 24 together with fourth sliding track 14 are used for normal signal and/or power transmission over the slip-ring assembly.
  • the overall design is comparatively simple. No care must be taken about electrical connections, unwanted currents and noise.
  • FIG 4 a simplified circuit diagram is shown. In this embodiment, only three sliding tracks together with brushes are used.
  • the second test port 52 of the wear indication circuit 50 is connected to the first signal path comprising third sliding brush 23 and third sliding track 13.
  • at least a common sliding track and sliding brush is shared with the main signal path. This reduces the number of required tracks. In this example sliding brush 22 and sliding ring 12 are no more required.
  • a further embodiment having a sensor is shown, using a sensor 69 which may be connected by a sensor port 54 to the wear indication circuit 50.
  • the sensor may be a temperature sensor, which for example may detect over-temperature or which even may detect the temperature profile of the slip-ring and may allow the wear indication circuit to calculate lifetime expectancy independent of temperature. For example, extremely high or low temperature may decrease lifetime, whereas using the slip-ring at moderate temperature levels may increase lifetime.
  • There may be a shock and/or vibration sensor for detecting mechanical vibrations, which may be an indication of a worn slip-ring module. It may also detect external vibration, which further would reduce the lifetime of the slip-ring assembly.
  • a test signal source 61 which preferably is a DC current or voltage source which also may be an AC current or voltage source, is connected via first test port 51 and second test port 52 to at least one sliding track and/or at least one sliding brush as shown above.
  • the test signal source 61 may be controlled by an evaluation circuit 68.
  • This evaluation circuit 68 may set up a specific current or voltage profile. For example, during short periods, a comparatively high current may be delivered to the slip-ring for measuring high current performance.
  • a series resistor 62 may be provided for measuring the current flowing through the sliding brush and sliding track, although current measurement may be done by other means like a hall sensor detecting the magnetic field of the current or a current transformer for measuring an AC current.
  • the voltage at the series resistor 62 may be amplified by current measurement amplifier 63 and delivered to evaluation circuit 68.
  • a voltage measurement amplifier 64 may be provided for measuring the voltage between the at least one sliding brush and the sliding track connected to the first test port 51 and second test port 52. Under normal operating conditions, the resistance of the slip-ring connection between the sliding brushes and sliding tracks may be comparatively low, so the voltage drop should be comparatively low. With increasing wear of the slip-ring, the voltage drop will increase.
  • a sensor amplifier 67 may be provided for delivering a signal in relation to the output of a sensor 69, connected to sensor port 54, to the evaluation circuit 68.
  • the evaluation circuit is a microcontroller
  • the signal port 53 is a port of a bus system.
  • a bus system may be a CAN bus or any other industrial control bus, or Ethernet or any wireless communication interface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Braking Arrangements (AREA)

Claims (8)

  1. Ensemble de bague collectrice (100) comprenant un module de bague collectrice (110), un bloc-balais de bague collectrice (120) et un circuit d'indication d'usure (50),
    le module de bague collectrice (110) ayant une pluralité de rainures de coulissement (11, 12, 13, 14),
    le bloc-balais de bague collectrice (120) ayant une pluralité de balais coulissants (21, 22, 23, 24) coulissant sur les rainures, dans lequel au moins une rainure de coulissement (11, 12) est une rainure d'indication d'usure électriquement connectée au circuit d'indication d'usure (50),
    caractérisé en ce que
    l'au moins une rainure d'indication d'usure (11, 12) est configurée pour avoir une durée de vie plus courte que les rainures restantes et/ou le balai d'indication d'usure coulissant sur celle-ci est configuré pour avoir une durée de vie plus courte que les balais restants.
  2. Ensemble de bague collectrice (100) selon la revendication 1,
    dans lequel l'au moins une rainure d'indication d'usure (11, 12) et/ou le balai (21, 22) coulissant sur celle-ci sont usés au préalable en comparaison avec les rainures et/ou balais restants.
  3. Ensemble de bague collectrice (100) selon la revendication 1,
    dans lequel l'au moins une rainure d'indication d'usure (11, 12) et/ou le balai (21, 22) coulissant sur celle-ci comprennent un revêtement galvanique plus mince et/ou un revêtement d'un matériau différent par rapport aux balais et/ou rainures restants.
  4. Ensemble de bague collectrice (100) selon l'une quelconque des revendications précédentes, dans lequel l'au moins un balai (21, 22) coulissant sur une rainure d'indication d'usure (11, 12) a une pression de contact plus élevée ou moins de graisse ou d'huile sur la rainure que les balais restants.
  5. Module de bague collectrice (110) comprenant un corps isolant (10) détenant une pluralité de rainures de coulissement (11, 12, 13, 14),
    caractérisé en ce que
    au moins une rainure de coulissement (11, 12) est une rainure d'indication d'usure configurée pour avoir une durée de vie plus courte que les rainures restantes.
  6. Module de bague collectrice (110) selon la revendication 5,
    caractérisé en ce que
    la rainure d'indication d'usure est usée au préalable en comparaison avec les rainures restantes.
  7. Module de bague collectrice (110) selon la revendication 5,
    caractérisé en ce que
    la rainure d'indication d'usure comprend un revêtement galvanique plus mince et/ou un revêtement d'un matériau différent par rapport aux rainures restantes.
  8. Bloc-balais de bague collectrice (120) comprenant un porte-balais (20) détenant une pluralité de balais coulissants (21, 22, 23, 24), et
    au moins un balai coulissant (21, 22) est un balai d'indication d'usure configuré pour avoir une durée de vie plus courte que les balais restants,
    caractérisé en ce que
    le balai d'indication d'usure est usé au préalable en comparaison avec les balais restants et/ou
    le balai d'indication d'usure comprend un revêtement galvanique plus mince et/ou un revêtement d'un matériau différent par rapport aux balais restants.
EP15781068.0A 2014-10-14 2015-10-14 Bague collectrice ayant une fonction de contrôle de l'usure Active EP3207599B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14188832 2014-10-14
PCT/EP2015/073764 WO2016059105A2 (fr) 2014-10-14 2015-10-14 Bague collectrice ayant une fonction de contrôle de l'usure

Publications (2)

Publication Number Publication Date
EP3207599A2 EP3207599A2 (fr) 2017-08-23
EP3207599B1 true EP3207599B1 (fr) 2023-11-22

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Application Number Title Priority Date Filing Date
EP15781068.0A Active EP3207599B1 (fr) 2014-10-14 2015-10-14 Bague collectrice ayant une fonction de contrôle de l'usure

Country Status (4)

Country Link
US (1) US11658449B2 (fr)
EP (1) EP3207599B1 (fr)
CN (1) CN106797099B (fr)
WO (1) WO2016059105A2 (fr)

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JP6441720B2 (ja) * 2015-03-19 2018-12-19 株式会社Ｓｕｂａｒｕ 回転機構及び回転式スキャナ
SG11201811241YA (en) * 2016-06-21 2019-01-30 Universal Instruments Corp Sliptrack architecture for an assembly machine, system and method
EP3319238A1 (fr) * 2016-11-08 2018-05-09 Schleifring GmbH Bague collectrice avec indication selective d'usure
EP3480901B1 (fr) 2017-11-06 2020-02-19 Schleifring GmbH Dispositif d'absorption de vibrations pour brosses à bague collectrice
DE102017131050B3 (de) * 2017-12-22 2019-01-24 Voith Patent Gmbh Anordnung zur elektrischen Erregung des Rotors einer elektrischen Maschine und Verfahren zum Betrieb
CN110364901A (zh) * 2019-07-20 2019-10-22 中国船舶重工集团公司第七二四研究所 一种基于专用工装的汇流环印制板装配方法
CN111682383B (zh) * 2020-06-16 2022-02-18 浙江大华技术股份有限公司 一种导电滑环
CN112198378B (zh) * 2020-09-07 2022-09-27 上海联影医疗科技股份有限公司 滑环故障检测装置及方法
CN113358341B (zh) * 2021-06-18 2022-05-13 杭州全盛机电科技有限公司 一种可靠性预计导电滑环寿命的方法

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Also Published As

Publication number Publication date
CN106797099B (zh) 2020-08-14
US20170214202A1 (en) 2017-07-27
WO2016059105A2 (fr) 2016-04-21
CN106797099A (zh) 2017-05-31
EP3207599A2 (fr) 2017-08-23
WO2016059105A3 (fr) 2016-09-29
US11658449B2 (en) 2023-05-23

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